Quality over quantity anyday for me.
Id rather have 9 great levels than 18 bland ones.
Also the gamelength isnt short. Some idiots complain about it when playing easy/normal and rush through it through combat. If you play stealth it will take minimum 15 hours for most people. I rushed through the game the first time and I used exactly 9 hours. Then I played stealth and used 17 hours. 26 hours + another 15 hours for a third walkthrough is about 40 hours of entertainment. And IMO I enjoyed the game so much Id pay the same for half that time. So I consider this game the first one this year that I didnt waste my money on. (Unlike Diablo 3 and alot of other letdowns this year)
Took me about 11 hours with stealth approach and a few random outbursts of killing.. i'm not complaining about the game, one of the best i've played, i'm just asking if i was wrong reading 11 missions somewhere.